DE60023502T2 - WELDING MUFF WITH REINFORCEMENT FOR PLASTIC PIPES - Google Patents
WELDING MUFF WITH REINFORCEMENT FOR PLASTIC PIPES Download PDFInfo
- Publication number
- DE60023502T2 DE60023502T2 DE60023502T DE60023502T DE60023502T2 DE 60023502 T2 DE60023502 T2 DE 60023502T2 DE 60023502 T DE60023502 T DE 60023502T DE 60023502 T DE60023502 T DE 60023502T DE 60023502 T2 DE60023502 T2 DE 60023502T2
- Authority
- DE
- Germany
- Prior art keywords
- annular
- pipe fitting
- reinforcing element
- cylindrical surface
- pipes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Revoked
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
- B29D23/003—Pipe joints, e.g. straight joints
- B29D23/005—Pipe joints, e.g. straight joints provided with electrical wiring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
- B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/114—Single butt joints
- B29C66/1142—Single butt to butt joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5229—Joining tubular articles involving the use of a socket
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5229—Joining tubular articles involving the use of a socket
- B29C66/52295—Joining tubular articles involving the use of a socket said socket comprising reinforcements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/02—Welded joints; Adhesive joints
- F16L47/03—Welded joints with an electrical resistance incorporated in the joint
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3468—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special electrical connectors of windings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
- B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/82—Testing the joint
- B29C65/8207—Testing the joint by mechanical methods
- B29C65/8246—Pressure tests, e.g. hydrostatic pressure tests
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/721—Fibre-reinforced materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
- B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Hair Curling (AREA)
Description
Gebiet der ErfindungField of the invention
Die vorliegende Erfindung betrifft Rohrformstücke, insbesondere Rohrformstücke zum Elektroschmelzen von Rohren zur Bildung einer Rohrleitung. Die vorliegende Erfindung betrifft auch eine Rohrleitung, in die ein Rohrformstück eingearbeitet ist. Die vorliegende Erfindung betrifft weiterhin ein Verfahren zur Herstellung eines Rohrformstücks.The The present invention relates to pipe fittings, in particular pipe fittings for Electric melting of pipes to form a pipeline. The present The invention also relates to a pipeline into which a pipe fitting is incorporated is. The present invention further relates to a method for producing a pipe fitting.
Kunststoffrohre, insbesondere aus Polyethylen gefertigte Rohre, sind weithin zur Verwendung beim Bilden von Rohrleitungen zum Befördern von Fluiden, wie etwa Wasser oder Erdgas, bekannt. Solche Rohrleitungen werden durch Miteinanderverbinden einer Abfolge individueller Rohre unter Verwendung von Rohrformstücken hergestellt. In der Technik ist es bekannt, Rohrformstücke zu verwenden, in die eine Heizspule eingearbeitet ist, die die aneinanderstoßenden Enden zweier miteinander zu verbindender Rohre umgibt. Wird ein elektrischer Strom durch die Spule geleitet, so veranlasst der Strom, dass Kunststoffmaterial in dem Rohrformstück schmilzt und durch Schmelzverlagerung an das Kunststoffmaterial der zwei Rohre geschmolzen wird, wodurch eine Schweißnaht gebildet wird, die die zwei Rohrenden miteinander versiegelt. Solche bekannten Elektroschmelzrohrformstücke leiden unter dem technischen Nachteil, dass sie auf Fluiddrücke in der Rohrleitung mit einem Maximum von 25 bar begrenzt sind. Bei höheren Drücken versagt das elektrogeschmolzene Formstück, was zu Lecken von oder dem katastrophalen Versagen der Rohrleitung führt. Solche Niederdruckrohrleitungen setzen Einschicht-Polyethylenrohre ein.Plastic pipes, in particular made of polyethylene pipes, are widely used to Use in forming conduits for conveying fluids, such as Water or natural gas, known. Such pipelines are interconnected a series of individual tubes made using pipe fittings. It is known in the art to use pipe fittings into which a Heating coil is incorporated, which is the abutting ends surrounds two pipes to be joined together. Becomes an electric Electricity passed through the coil, so the current causes that plastic material in the pipe fitting melts and by melting displacement of the plastic material the two tubes is melted, creating a weld which seals the two pipe ends together. Such known Electro-fusion fittings suffer from the technical disadvantage of being on fluid pressures in the pipeline are limited to a maximum of 25 bar. At higher pressures fails the electro-melted fitting, what to lick of or the catastrophic failure of the pipeline leads. Such low pressure pipelines utilize single-layer polyethylene pipes one.
EPA-0396273 offenbart einen Elektroschmelzrohrkoppler für solche Niederdruckrohrleitungen, der eine Außenhülle und eine durch eine dazwischenliegende Schicht spritzgegossenen Thermoplastematerials darin festgehaltene elektrische Widerstandsheizspule umfasst.EPA 0396273 discloses an electrofusion pipe coupler for such low pressure pipelines, the one outer shell and a thermoplastic material injection molded by an intermediate layer therein fixed electrical resistance heating coil comprises.
DE-C-3932807 offenbart eine Schweißmuffe und ein Verfahren zu deren Herstellung, wobei die Schweißmuffe einen thermoplastischen, röhrenförmigen Muffenkörper mit einer Heizdrahtwicklung an seiner Innenfläche und einer mit dem Muffenkörper verbundenen Verstärkungsschicht umfasst. Die Verstärkungsschicht ist zur Sicherstellung dessen konzipiert, dass der Schweißdruck während des Schweißens absorbiert wird und die Betriebslebensdauer verlängert ist.DE-C-3932807 discloses a welding sleeve and a method for their production, wherein the welding sleeve a thermoplastic, tubular sleeve body with a Heizdrahtwicklung on its inner surface and one connected to the sleeve body reinforcing layer includes. The reinforcing layer is designed to ensure that the welding pressure during the welding is absorbed and the service life is extended.
CH-A-683026 offenbart eine Schweißmuffe für Kunststoffrohre, wobei ein Verstärkungsgitter aus Stahldraht oder eine perforierte Stahlröhre in der Schweißmuffe eingebettet ist.CH-A-683 026 discloses a welding sleeve for plastic pipes, wherein a reinforcing grid made of steel wire or a perforated steel tube embedded in the welding sleeve is.
US-A-4770442 offenbart ein Elektroschweißformstück oder -kragen, der auf zuverlässige Weise Kontaktdruck in der Schweißzone ausübt, indem er eine Verstärkung in Form einer an der Außenfläche des Körpers des Formstücks angeordneten Wicklung oder Röhre vorsieht, wobei der thermische Ausdehnungskoeffizient der Verstärkung kleiner als der des Körpers ist.US-A-4770442 discloses an electrofusion fitting or collar, reliable Ways to apply contact pressure in the weld zone by a gain in Form one on the outer surface of the body of the fitting arranged winding or tube provides, wherein the thermal expansion coefficient of the gain is smaller as that of the body is.
US-A-5364130 offenbart eine Hitzeschweißvorrichtung mit Kupplung für röhrenförmige Kunststoffrohre, wobei außer einem einstückig geformten Kupplungsteil auch eine Rohrkupplung offenbart ist, die mit einem Innenteil in Form einer Rohrmuffe oder Buchse und getrennten, verbindbaren, hüllenähnlichen Außenteilen hergestellt ist. Bei einer solchen Anordnung wird ein gewünschter äußerlicher Kraftschluss in der Umgebung der Verbindungsstelle der Rohre durch das Ineinandergreifen zwei hüllenartiger Hälften von Verstärkungshüllen zustande gebracht, um eine Kraftübertragungsbrücke zu bilden.US-A-5364130 discloses a heat-welding device with clutch for tubular plastic pipes, except except one piece molded coupling part is also disclosed a pipe coupling, the with an inner part in the form of a pipe socket or bushing and separate, connectable, shell-like Exterior parts made is. In such an arrangement, a desired external adhesion in the Environment of the junction of the pipes by the mesh two sheath-like halves of reinforcing sleeves brought to form a power transmission bridge.
GB-A-2299047 offenbart die Fertigung von Elektroschmelzformstücken, wobei ein Körper aus thermoplastischem Material über einer formhaltenden Struktur, die ein elektrisches Heizelement in einer Schicht thermoplastischen polymeren Plattenmaterials umfasst, geformt wird.GB-A-2299047 discloses the manufacture of electrofusion fittings, wherein a body of thermoplastic material over a shape-retaining structure, which is an electric heating element in a layer of thermoplastic polymeric sheet material, is formed.
GB-A-1121850 offenbart ein Verbindungsverfahren von rohrförmigen Kunststoffen und Verbindungsmaterialien, wobei ein elektrischer Heizdraht auf einen Endteil eines Kunststoffmantels eines kunststoffummantelten Kabels gewickelt wird und dann eine Kunststoffhülle überlappend an der Außenseite des elektrischen Heizdrahts plaziert wird. Danach wird dem Heizdraht elektrischer Strom zugeführt, während ein Kompressionsdruck auf den gesamten überlappten Teil angelegt wird, sodass die Kunststoffummantelung und die Kunststoffhülle durch Erhitzen zu einem integralen Körper vereint werden.GB-A-1121850 discloses a bonding method of tubular plastics and joining materials, wherein an electric heating wire on an end portion of a plastic sheath a plastic-coated cable is wound and then a Plastic cover overlapping on the outside of the electric heating wire is placed. After that, the heating wire electrical power supplied, while a compression pressure is applied to the entire overlapped part, so that the plastic sheath and the plastic sheath through Heating to an integral body be united.
EP-A-0693652 offenbart einen Elektroschweiß-Rohranschluss, wobei zwei oder mehr Schichten eines äußeren zylindrischen, aus thermoplastischem Kunststoff bestehenden Elements durch aufeinanderfolgende Spritzgießschritte um ein mit Widerstandsdraht umwickeltes inneres zylindrisches Element gebildet sind. Zur Verringerung der Spritzgießzeit wird offenbart, dass aus drei Schichten bestehende innere und äußere zylindrische Elemente aufeinanderfolgend geformt werden, statt einer einzigen dickeren Schicht.EP-A-0693652 discloses an electrofusion pipe fitting wherein two or more layers of an outer cylindrical thermoplastic element are successively formed Injection molding steps are formed around a wound with resistance wire inner cylindrical member. To reduce injection molding time, it is disclosed that three-layered inner and outer cylindrical members are formed sequentially, rather than a single thicker layer.
EP-A-0303909 offenbart die Fertigung eines Elektroschmelzkopplers, wobei eine röhrenförmige Kunststoff-Vorform mit einem Widerstandsheizdraht umwickelt wird und der Heizdraht vollständig in der Vorform eingebettet ist. Danach wird ein äußerer einkapselnder Mantel um die Vorform herum spritzgegossen.EP-A-0303909 discloses the manufacture of an electrofusion coupler, wherein a tubular plastic preform is wrapped with a resistance heating wire and the heating wire Completely embedded in the preform. After that becomes an outer encapsulating coat injection molded around the preform.
Die Patentbeschreibungen, auf die hierin vorangehend verwiesen wird, leiden unter dem Problem, dass sie nicht speziell auf die Fertigung von Elektroschmelzrohrformstücken, die bei hohen Fluiddrücken in der Rohrleitung, typischerweise höher als etwa 25 bar, eingesetzt werden können, gerichtet sind.The Patent Specifications, referred to hereinbefore, suffer from the problem that they are not specific to manufacturing of electrofusion pipe fittings, at high fluid pressures used in the pipeline, typically higher than about 25 bar can be are directed.
In
der Technik sind auch Hochdruckrohrleitungen bekannt, wobei verstärkte Rohre
bei Fluiddrücken über 25 bar
eingesetzt werden. Solche verstärkten
Rohre haben Mehrschichtkonstruktionen, beispielsweise aus mehrfachen
Kunststofflagen, die zusätzlich
eine Verstärkungsschicht
einschließlich
eines Metalls umfassen können.
Für solche
Hochdruckrohrleitungen ist es bekannt, eine mechanische Kupplung
zu verwenden, um anstoßende
Enden von zwei benachbarten Rohren versiegelt miteinander zu verbinden.
Solche mechanischen Kupplungen umfassen ein ringförmiges Metallelement,
das versiegelt um die gegenüberliegenden
anstoßenden
Enden der Rohre verbolzt ist, oder, wie in
In der Technik besteht ein Bedarf an einem Rohrformstück, das das Elektroverschmelzen von Rohren in einer Hochdruckrohrleitung ermöglicht.In There is a need in the art for a pipe fitting that the electrical fusion of pipes in a high pressure pipeline allows.
Entsprechend verschafft die vorliegende Erfindung ein Rohrformstück zum Aneinanderkuppeln gegenüberliegender Enden von zwei Kunststoffrohren durch Schmelzschweißung, wobei das Rohrformstück einen ringförmigen Körper mit einer inneren zylindrischen Oberfläche aus Kunststoffmaterial, der einen zylindrischen Hohlraum zur Aufnahme gegenüberliegender Enden von zwei aneinanderzukuppelnden Kunststoffrohren umgibt, eine elektrisch leitfähige Spule, die in besagter innerer zylindrischer Oberfläche vorgesehen ist und den zylindrischen Hohlraum umgibt, wobei die Spule entgegengesetzte Enden aufweist, ein Paar Anschlussklemmen, die jede an ein jeweiliges Ende der Spule angeschlossen und an dem Körper zum Anschluss an eine Quelle gesteuerter elektrischer Energie vorgesehen sind, und ein ringförmiges Verstärkungselement, das in dem Körper untergebracht ist und die Spule umgibt, umfasst, wobei das ringförmige Verstärkungselement eine gerillte Oberfläche aufweist, die eine Grenzfläche mit dem ringförmigen Körper bildet, wobei die gerillte Oberfläche eine Vielzahl axial gerichteter Oberflächen definiert.Corresponding provides the present invention, a pipe fitting for intermeshing opposed Ends of two plastic tubes by fusion welding, wherein the pipe fitting an annular body with an inner cylindrical surface made of plastic material, the one cylindrical cavity for receiving opposite Ends of two plastic pipes to be coupled together, one electrically conductive Coil provided in said inner cylindrical surface is and surrounds the cylindrical cavity, the coil being opposite Ends, a pair of terminals, each to a respective End of the coil connected and attached to the body for connection to a source controlled electrical energy are provided, and an annular reinforcing element, that in the body is housed and surrounds the coil, wherein the annular reinforcing element a grooved surface which has an interface with the annular body forms, wherein the grooved surface a plurality of axially directed surfaces Are defined.
Die vorliegende Erfindung verschafft weiterhin eine Rohrleitung, die zumindest zwei Polyethylenrohre beinhaltet, die gegenüberliegende Enden haben, die durch zumindest ein Rohrformstück gemäß der Erfindung aneinandergekoppelt sind, wobei die innere zylindrische Oberfläche des ringförmigen Körpers an eine äußere zylindrische Oberfläche jedes Rohrendes schmelzgeschweißt ist, wobei der ringförmige Körper aus Polyethylen zusammengesetzt ist und das ringförmige Verstärkungselement zumindest dieselbe Zugstärke in einer Umfangsrichtung hat wie die der Polyethylenrohre.The The present invention further provides a pipeline which includes at least two polyethylene pipes, the opposite Having ends which are coupled together by at least one pipe fitting according to the invention are, wherein the inner cylindrical surface of the annular body to an outer cylindrical surface each pipe end is fusion-welded is, wherein the annular body is composed of polyethylene and the annular reinforcing element at least the same tensile strength in a circumferential direction like that of the polyethylene pipes.
Die vorliegende Erfindung verschafft weiterhin ein Verfahren zur Herstellung eines Rohrformstücks zum Aneinanderkuppeln gegenüberliegender Enden von zwei Kunststoffrohren durch Schmelzschweißung, wobei das Verfahren die Schritte umfasst des: (a) Formens einer elektrisch leitenden Spule um einen im Wesentlichen zylindrischen Kernkörper; (b) Anformens eines ersten ringförmigen Körperteils des Rohrformstücks um die Spule und den Kernkörper und Anbringens eines ringförmigen Verstärkungselements um den ersten ringförmigen Körperteil; (c) Anformens eines zweiten ringförmigen Körperteils des Rohrformstücks um das ringförmige Verstärkungselement und den ersten ringförmigen Körperteil und den Kernkörper, um das Rohrformstück zu formen; und (d) Entfernen des Kernkörpers aus dem Rohrformstück.The The present invention further provides a method of preparation a pipe fitting for Coupling on opposite sides Ends of two plastic tubes by fusion welding, wherein the method comprises the steps of: (a) forming an electrical conductive coil around a substantially cylindrical core body; (B) Molding a first annular body part of the pipe fitting the coil and the core body and attaching an annular reinforcing element around the first annular Body part; (c) molding a second annular body part of the pipe fitting around the annular reinforcing element and the first annular one body part and the core body, around the pipe fitting to shape; and (d) removing the core body from the pipe fitting.
Die Schritte (b) und (c) können als eine Abfolge von Schritten oder als Einzelschritt ausgeführt werden.The Steps (b) and (c) can be executed as a sequence of steps or as a single step.
Es werden nun Ausführungen der vorliegenden Erfindung beschrieben, nur als Beispiel, unter Verweis auf die begleitenden Zeichnungen, worin:It will now be executions of the present invention, by way of example only Reference to the accompanying drawings, wherein:
In den Zeichnungen sind Breite oder Dicke mancher Elemente zwecks deutlicher Darstellung übertrieben dargestellt.In In the drawings, width or thickness of some elements are clearer for the purpose of clarity Representation exaggerated shown.
Bezugnehmend
auf
Ein
ringförmiges
Verstärkungselement
Das
ringförmige
Verstärkungselement
Im
Gebrauch werden die zwei Rohrenden
Wird
die resultierende Rohrleitung Fluidhochdruck darin unterworfen,
beispielsweise auf Drücken
von mehr als 25 bar, verleiht das Vorhandensein des ringförmigen Verstärkungselements
Da
das ringförmige
Verstärkungselement
Die
Danach,
wie in
Bezugnehmend
auf
Schließlich wird
der Kernkörper
Es
ist auch möglich,
das in
In
Bezugnehmend
auf
Ein
ringförmiges
Verstärkungselement
Das
ringförmige
Verstärkungselement
In
der dargestellten Ausführung
ist nur die innere zylindrische Oberfläche
Das
Vorsehen eines gerillten Oberflächenprofils
Unter
Berücksichtigung
des bei Gebrauch auf das Rohrformstück angelegten Beanspruchung
wird das Rohrformstück
als Ergebnis innerer Druckbeaufschlagung des Fluids in der Rohrleitung
einer längsgerichteten (d.h.
axialen) Belastung unterzogen, die eine Hälfte der ringförmigen Umfangsspannung
beträgt.
Die maximale Längsbelastung,
der das Rohrformstück
unterzogen werden kann, ist gleich der Streckspannung des Polyethylenmaterials,
das den ringförmigen
Körper
Dementsprechend ist ersichtlich, dass ein Anstieg in der Anzahl von Rillen (n) die maximale Umfangsspannung erhöht, der das Rohrformstück beim Gebrauch vor Versagen unterzogen werden kann.Accordingly It can be seen that an increase in the number of grooves (n) the maximum hoop stress increased, the pipe fitting can be subjected to failure before use.
Wiederum
bezugnehmend auf die
Die überbrückenden
Perforationen
In den abgebildeten Ausführungen ist ein lineares Rohrformstück zum Miteinanderverbinden zweier Rohre vom selben Durchmesser dargestellt. Das Rohrformstück kann zum Miteinanderverbinden von Rohren unterschiedlichen Durchmessers konfiguriert sein, entweder in einer linearen Ausrichtung oder als Rohrkrümmer oder Bogen. Die vom Elektroschmelzen des Kunststoffmaterials herrührende Schmelzverlagerung passt sich an den Durchmesserunterschied an, um eine zuverlässig versiegelte Naht sicherzustellen. Das Rohrformstück kann auch zum Miteinanderverbinden von mehr als zwei Rohren, beispielsweise drei Rohren in Form eines T-Rohrformstücks, konfiguriert sein.In the illustrated versions is a linear pipe fitting to connect two pipes of the same diameter. The pipe fitting can be used to connect tubes of different diameters be configured, either in a linear orientation or as elbow or bow. The melting displacement resulting from the electrofusion of the plastic material adapts to the diameter difference to a reliably sealed Ensuring seam. The pipe fitting may also be connected together of more than two pipes, for example three pipes in the form of a T-pipe fitting, configured be.
Die vorliegende Erfindung wird nun unter Verweis auf das nachfolgende, nicht einschränkende Beispiel detaillierter erläutert.The present invention will now be described with reference to the following, not restrictive Example explained in more detail.
Beispielexample
Zwei
Rohrformstücke
mit der in
Claims (18)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99113921 | 1999-07-16 | ||
EP99113921 | 1999-07-16 | ||
PCT/EP2000/006863 WO2001006168A1 (en) | 1999-07-16 | 2000-07-12 | Reinforced electro-welding sleeve for plastic pipes |
Publications (2)
Publication Number | Publication Date |
---|---|
DE60023502D1 DE60023502D1 (en) | 2005-12-01 |
DE60023502T2 true DE60023502T2 (en) | 2006-07-27 |
Family
ID=8238608
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE60023502T Revoked DE60023502T2 (en) | 1999-07-16 | 2000-07-12 | WELDING MUFF WITH REINFORCEMENT FOR PLASTIC PIPES |
Country Status (11)
Country | Link |
---|---|
US (2) | US6406063B1 (en) |
EP (1) | EP1196714B1 (en) |
JP (1) | JP2003504586A (en) |
AR (1) | AR024743A1 (en) |
AT (1) | ATE308012T1 (en) |
AU (1) | AU6824300A (en) |
DE (1) | DE60023502T2 (en) |
MX (1) | MXPA02000567A (en) |
NO (1) | NO20020189L (en) |
RU (1) | RU2002100708A (en) |
WO (1) | WO2001006168A1 (en) |
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-
2000
- 2000-07-11 US US09/614,466 patent/US6406063B1/en not_active Expired - Fee Related
- 2000-07-12 DE DE60023502T patent/DE60023502T2/en not_active Revoked
- 2000-07-12 JP JP2001510770A patent/JP2003504586A/en active Pending
- 2000-07-12 EP EP00956202A patent/EP1196714B1/en not_active Revoked
- 2000-07-12 RU RU2002100708/06A patent/RU2002100708A/en not_active Application Discontinuation
- 2000-07-12 AT AT00956202T patent/ATE308012T1/en not_active IP Right Cessation
- 2000-07-12 AU AU68243/00A patent/AU6824300A/en not_active Abandoned
- 2000-07-12 WO PCT/EP2000/006863 patent/WO2001006168A1/en active IP Right Grant
- 2000-07-12 MX MXPA02000567A patent/MXPA02000567A/en unknown
- 2000-07-14 AR ARP000103622A patent/AR024743A1/en unknown
-
2002
- 2002-01-14 NO NO20020189A patent/NO20020189L/en not_active Application Discontinuation
- 2002-04-17 US US10/124,675 patent/US20020109348A1/en not_active Abandoned
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111347185A (en) * | 2020-03-07 | 2020-06-30 | 广东韶钢松山股份有限公司 | Dust remover bell mouth reinforcing device and installation method |
Also Published As
Publication number | Publication date |
---|---|
US20020109348A1 (en) | 2002-08-15 |
JP2003504586A (en) | 2003-02-04 |
ATE308012T1 (en) | 2005-11-15 |
US6406063B1 (en) | 2002-06-18 |
NO20020189L (en) | 2002-02-14 |
AU6824300A (en) | 2001-02-05 |
RU2002100708A (en) | 2003-09-10 |
DE60023502D1 (en) | 2005-12-01 |
MXPA02000567A (en) | 2003-07-21 |
EP1196714A1 (en) | 2002-04-17 |
EP1196714B1 (en) | 2005-10-26 |
AR024743A1 (en) | 2002-10-23 |
WO2001006168A1 (en) | 2001-01-25 |
NO20020189D0 (en) | 2002-01-14 |
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8331 | Complete revocation | ||
8363 | Opposition against the patent |